I like the new set, I think DCE will open up a bunch of overlooked cards and help out my current obsession, Burmy, being a little better.
Now, as far as everything else, I see Energy manipulation will be a bigger deal. Ampharos Prime does the Connectivity thing, plus Lightning Crush on him is a big deal. We have Rain Dance coming back from Base Set on Feraligatr Prime, Leaf Trans getting another reprint on Meganium Prime, Heat Reveal (Discard a {f} to draw 3), Fire Destruction on Typhlosion Prime (80, discard an energy on Typhlosion and on the defending pokemon). I could keep going, but there's a lot. Believe me, I believe that'll be a new trick that everyone will have to work around and learn how to deal with in the next set. That can cripple a lot of decks, especially SP's (Energy Gain or not), as well as disrupt a lot of other ones.